Resilient stop for navigational sounding machines



Nov. 7, 1933.

RESILIENT STOP FOR NAVIGATIONAL SOUNDING MACHINES A. LIETZ Original Filed Oct. 20, 1928 2 Sheets-Sheet l III IHI Illl IHIII A. LIETZ Nov. 7, 1933.

RESILIENT STOP FOR NAVIGATIONAL SOUNDING MACHINES 2 Sheets-Sheet 2 Original Filed Oct. 20, 1928 Patented Nov. 7, 1933 PATENTv OFFICE RESILIENT s'ror Fon NAVI.GATIONALl soUNDING MACHINES Adolph Lietz, San Francisco, Calif.

Application October 20, 1928, SerialNo. 313,756 Renewed March 27,1933

4 Claims. (Cl.V 18S-82) This invention relates to a resilient stop for the winding drums of navigational. sounding machines, and its object is to give enough of an increasingly retarded movement to the drum to VV bring it to its actual stop without danger of breaking the line.

With the present construction a retarded movement through approximately 90 degrees is possible, althoughy the actual retarded move- Yj ment might be increased if desired.

Another object of the invention is to provide an automatic stop action which will also act as an automatic pawl lift when necessary to prevent the pawl from dragging over the teeth of the pawl wheel.

Another object of this invention is to apply to the winding drum of a navigational sounding machine a stop which will prevent the liquid used in the sounding tubes from spurting or jumping in the tube when the brake is applied to the drum. This spurting or jumping interferes with the proper indication of the liquid in the tube. This occurs when a stop is applied to the winding drum that does not allow a certain time for the line to come to rest.

It will be understood by those skilled in the art that as soon as the sounding tube strikes the bottom there is a release of tension on the sounding line, and this release of the tension causes aojthe pawl to engage the pawl wheel whereupon the resilient stop becomes effective to prevent the jumping of the liquid, o1' spurting of the liquid above referred to. l

Other objects of the invention will be apparent as the description proceeds.

An embodiment of the invention is shown in the accompanying drawings in which the same reference numeral is applied to the same portion throughout the several figures of the drawings and of which there may be modifications.

' Figure 1 is a front elevation of the navigational sounding machine with a portion of its casing removed for the purpose of illustrating the mechamsm.

Figure 2 is a vertical sectional view through the shaft for operating the winding drum and illustrating the operation of the stop,

Figure 3 is a vertical sectional view parallel to the shaft of the winding drum showing the stop springs and automatic pawl operating column,

Figure 4 is a side elevation of the automatic pawl operating column.

The numeral l indicates the casing of the` sounding machine which has legs 2, 3, 4 and 5 for its support. Suitable controi means connected with the electric motor 6 is provided for the operation of the gear system, but which control means form no part of the present invention.

The motor shaft isindicated at 7-and carries the gear 8 in mesh with a larger gear 9 on the 60 shaft 10; the latter shaft also carrying a smaller gear 11 in mesh with a gear 12 on the drum shaft 13.

The winding drum 14 is of a common form, with wide side flanges 15 and 16, and it is secured 65 to the shaft 13 on which the pawl wheel 17 is loosely mounted A boss 18 of the casing 1 provides a bearing for the pin 19 about which the pawl 20 pivots. A hub 21 is secured to the shaft 13 and through the aid of the lugs 22, 23, and 7o springs 24, 25 drives the wheel 17 in either direction. A split collar, consisting of two semi-circular members 27, 28 is placed over the shaft' 13 between the collar 21 and the hub of the gear 12. This split collarhas its two portions 27--28v75--. loosely riveted together at -its lower end. The spring 30 encircles the bolt 30 and expands against the lug 31 and the head of the bolt to urge the upper ends of the collar 27-28 together. The collar thus frictionally engages the shaft 13 30 under the tension of the spring 30. The slotted arm 32 extends upwardly and laterally from the member 28 and engages over the pin 34 which is fixed on the side of the pawl 20. When the shaft 13 reverses its movement in either direcg5 tion, the split collar 27-28 is partially rotated by reason of its frictional engagement with the shaft 13. The arm 32 moves with the split collar, thus raising or lowering the pin 34 to-disengage or to engage the pawl 20, as the case may g be. After the arm 32 has raised or lowered the pawl 20 to its fullest extent, the pin 34 checks further movement of the split collar on the shaft 13. The split collar then remains stationary and slips on the moving shaft 13 until the move- 95 ment of the shaft is again reversed.

If the pawl is raised, the drum can travel in either direction without being interferred with, but as the wheel 12 turns in the opposite direction the burden of stopping the drum will rest upon the pawl 20, pawl wheel 17, and the two lugs 22, 23 which will compress the springs 24,

25, but at the same time allow the drum to turn about one-fourth of a revolution. Any move-y ment of the shaft 13 in the opposite direction will 105. cause the pin 34 to lift the pawl 20 out of engagement with the pawl wheel 17.

Having thusdescribed my invention, what I desire to secure by Letters Patent of the United States is as follows but modifications may be 11G made in carrying out the invention as shown in the drawings and in the above particularly described form thereof, Within the purview of the annexed claims.

What is claimed is,

l. A resilient stop for navigational sounding machines, comprising a line winding drum, a shaft for said drum, a boss fixed to said shaft, a

recess in the face of said boss, springs in said recess, a pawl wheel mounted loosely on said shaft, a recess in the face of said wheel in alignment with the recess in the boss, lugs engaging said springs, a split friction collar on said shaft, an arm on said collar having a tangential'slot, a pivoted pawl adapted to engage said pawl Wheel, a pin in said pawl engaging said slot, and means to drive said shaft. v` i 2. A navigational sounding machine comprising a winding drum; driving means engaging said drum; a resilient clutch interposed in said driving means ;-a ratchet on said clutch; apawl pivoted'on said machine and adapted to engage said ratchet; and means of automatically engaging said pawl when said drum is reversed.

3. A navigational sounding machine compris- .xnachine, said pawl being adapted to engage said ratchet when said drum is wound up, said pawl being out of engagement When the drum is unwound, means for automatically changing the position of said pawl when the movement of said shaft is reversed, and` cushioningvmeans interposed between said drum and driving means.

ADOLPH LIETZ; l 

